The Chamberlain 144C54 belt drive idler pulley from Garage Door Supply Company is an OEM replacement part for garage door openers with square rail assemblies. The Chamberlain belt drive idler pulley guides the belt on your garage door operator. Our idler pulley for Chamberlain garage doors is also compatible with LiftMaster and Craftsman operators with square rail assemblies. Shop our low prices on all Chamberlain parts and accessories.
- For residential garage door openers with square rail assemblies
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